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Finding the Fourth Proportional to 123,670.40, 185,286.90 and 104,862.20

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Solution

The fourth proportional to 123,670.40, 185,286.90 and 104,862.20 is: 157,107.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,670.40 : 185,286.90 = 104,862.20 : x
  2. Step 2: Convert to fraction form
    123,670.40/185,286.90 = 104,862.20/x
  3. Step 3: Cross multiply
    123,670.40x = 185,286.90 × 104,862.20
  4. Step 4: Simplify right side
    123,670.40x = 19,429,591,965.18
  5. Step 5: Solve for x
    x = 19,429,591,965.18/123,670.40
  6. Step 6: Final answer
    x = 157,107.86

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.